| 1 | //
|
|---|
| 2 | // ********************************************************************
|
|---|
| 3 | // * License and Disclaimer *
|
|---|
| 4 | // * *
|
|---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
|
|---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
|
|---|
| 7 | // * conditions of the Geant4 Software License, included in the file *
|
|---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
|
|---|
| 9 | // * include a list of copyright holders. *
|
|---|
| 10 | // * *
|
|---|
| 11 | // * Neither the authors of this software system, nor their employing *
|
|---|
| 12 | // * institutes,nor the agencies providing financial support for this *
|
|---|
| 13 | // * work make any representation or warranty, express or implied, *
|
|---|
| 14 | // * regarding this software system or assume any liability for its *
|
|---|
| 15 | // * use. Please see the license in the file LICENSE and URL above *
|
|---|
| 16 | // * for the full disclaimer and the limitation of liability. *
|
|---|
| 17 | // * *
|
|---|
| 18 | // * This code implementation is the result of the scientific and *
|
|---|
| 19 | // * technical work of the GEANT4 collaboration. *
|
|---|
| 20 | // * By using, copying, modifying or distributing the software (or *
|
|---|
| 21 | // * any work based on the software) you agree to acknowledge its *
|
|---|
| 22 | // * use in resulting scientific publications, and indicate your *
|
|---|
| 23 | // * acceptance of all terms of the Geant4 Software license. *
|
|---|
| 24 | // ********************************************************************
|
|---|
| 25 | //
|
|---|
| 26 | //
|
|---|
| 27 | // $Id: G4CrossSectionChargeDecreasePartial.cc,v 1.1 2007/11/08 18:25:25 pia Exp $
|
|---|
| 28 | // GEANT4 tag $Name: $
|
|---|
| 29 | //
|
|---|
| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
|
|---|
| 31 | //
|
|---|
| 32 | // Reference: TNS Geant4-DNA paper
|
|---|
| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978
|
|---|
| 34 |
|
|---|
| 35 | // History:
|
|---|
| 36 | // -----------
|
|---|
| 37 | // Date Name Modification
|
|---|
| 38 | // 28 Apr 2007 M.G. Pia Created in compliance with design described in TNS paper
|
|---|
| 39 | // 08 Nov 2007 MGP Got code from S.I.; added variable initialisation to avoid compilation warnings
|
|---|
| 40 | //
|
|---|
| 41 | // -------------------------------------------------------------------
|
|---|
| 42 |
|
|---|
| 43 | // Class description:
|
|---|
| 44 | // Geant4-DNA Cross total cross section for electron elastic scattering in water
|
|---|
| 45 | // Reference: TNS Geant4-DNA paper
|
|---|
| 46 | // S. Chauvie et al., Geant4 physics processes for microdosimetry simulation:
|
|---|
| 47 | // design foundation and implementation of the first set of models,
|
|---|
| 48 | // IEEE Trans. Nucl. Sci., vol. 54, no. 6, Dec. 2007.
|
|---|
| 49 | // Further documentation available from http://www.ge.infn.it/geant4/dna
|
|---|
| 50 |
|
|---|
| 51 | // -------------------------------------------------------------------
|
|---|
| 52 |
|
|---|
| 53 |
|
|---|
| 54 | #include "G4CrossSectionChargeDecreasePartial.hh"
|
|---|
| 55 | #include "G4ParticleDefinition.hh"
|
|---|
| 56 | #include "G4Proton.hh"
|
|---|
| 57 | #include "G4DNAGenericIonsManager.hh"
|
|---|
| 58 |
|
|---|
| 59 | #include "Randomize.hh"
|
|---|
| 60 |
|
|---|
| 61 |
|
|---|
| 62 | G4CrossSectionChargeDecreasePartial::G4CrossSectionChargeDecreasePartial()
|
|---|
| 63 | {
|
|---|
| 64 |
|
|---|
| 65 | //PROTON
|
|---|
| 66 | f0[0][0]=1.;
|
|---|
| 67 | a0[0][0]=-0.180;
|
|---|
| 68 | a1[0][0]=-3.600;
|
|---|
| 69 | b0[0][0]=-18.22;
|
|---|
| 70 | b1[0][0]=-1.997;
|
|---|
| 71 | c0[0][0]=0.215;
|
|---|
| 72 | d0[0][0]=3.550;
|
|---|
| 73 | x0[0][0]=3.450;
|
|---|
| 74 | x1[0][0]=5.251;
|
|---|
| 75 |
|
|---|
| 76 | numberOfPartialCrossSections[0] = 1;
|
|---|
| 77 |
|
|---|
| 78 | //ALPHA++
|
|---|
| 79 | f0[0][1]=1.; a0[0][1]=0.95;
|
|---|
| 80 | a1[0][1]=-2.75;
|
|---|
| 81 | b0[0][1]=-23.00;
|
|---|
| 82 | c0[0][1]=0.215;
|
|---|
| 83 | d0[0][1]=2.95;
|
|---|
| 84 | x0[0][1]=3.50;
|
|---|
| 85 |
|
|---|
| 86 | f0[1][1]=1.;
|
|---|
| 87 | a0[1][1]=0.95;
|
|---|
| 88 | a1[1][1]=-2.75;
|
|---|
| 89 | b0[1][1]=-23.73;
|
|---|
| 90 | c0[1][1]=0.250;
|
|---|
| 91 | d0[1][1]=3.55;
|
|---|
| 92 | x0[1][1]=3.72;
|
|---|
| 93 |
|
|---|
| 94 | x1[0][1]=-1.;
|
|---|
| 95 | b1[0][1]=-1.;
|
|---|
| 96 |
|
|---|
| 97 | x1[1][1]=-1.;
|
|---|
| 98 | b1[1][1]=-1.;
|
|---|
| 99 |
|
|---|
| 100 | numberOfPartialCrossSections[1] = 2;
|
|---|
| 101 |
|
|---|
| 102 | // ALPHA+
|
|---|
| 103 | f0[0][2]=1.;
|
|---|
| 104 | a0[0][2]=0.65;
|
|---|
| 105 | a1[0][2]=-2.75;
|
|---|
| 106 | b0[0][2]=-21.81;
|
|---|
| 107 | c0[0][2]=0.232;
|
|---|
| 108 | d0[0][2]=2.95;
|
|---|
| 109 | x0[0][2]=3.53;
|
|---|
| 110 |
|
|---|
| 111 | x1[0][2]=-1.;
|
|---|
| 112 | b1[0][2]=-1.;
|
|---|
| 113 |
|
|---|
| 114 | numberOfPartialCrossSections[2] = 1;
|
|---|
| 115 |
|
|---|
| 116 | }
|
|---|
| 117 |
|
|---|
| 118 | G4CrossSectionChargeDecreasePartial::~G4CrossSectionChargeDecreasePartial()
|
|---|
| 119 | { }
|
|---|
| 120 |
|
|---|
| 121 | G4double G4CrossSectionChargeDecreasePartial::CrossSection(G4double k, G4int index,
|
|---|
| 122 | const G4ParticleDefinition* particleDefinition)
|
|---|
| 123 | {
|
|---|
| 124 | G4int particleTypeIndex = 0;
|
|---|
| 125 | G4DNAGenericIonsManager* instance;
|
|---|
| 126 | instance = G4DNAGenericIonsManager::Instance();
|
|---|
| 127 |
|
|---|
| 128 | if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
|
|---|
| 129 | if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
|
|---|
| 130 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
|
|---|
| 131 |
|
|---|
| 132 | //
|
|---|
| 133 | // sigma(T) = f0 10 ^ y(log10(T/eV))
|
|---|
| 134 | //
|
|---|
| 135 | // / a0 x + b0 x < x0
|
|---|
| 136 | // |
|
|---|
| 137 | // y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1
|
|---|
| 138 | // |
|
|---|
| 139 | // \ a1 x + b1 x >= x1
|
|---|
| 140 | //
|
|---|
| 141 | //
|
|---|
| 142 | // f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
|
|---|
| 143 | //
|
|---|
| 144 | // f0 has been added to the code in order to manage partial (shell-dependent) cross sections (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1)
|
|---|
| 145 | //
|
|---|
| 146 | // From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
|
|---|
| 147 | // Inelastic-collision cross sections of liquid water for interactions of energetic proton
|
|---|
| 148 | //
|
|---|
| 149 |
|
|---|
| 150 | if (x1[index][particleTypeIndex]<x0[index][particleTypeIndex])
|
|---|
| 151 | {
|
|---|
| 152 | //
|
|---|
| 153 | // if x1 < x0 means that x1 and b1 will be calculated with the following formula (this piece of code is run on all alphas and not on protons)
|
|---|
| 154 | //
|
|---|
| 155 | // x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
|
|---|
| 156 | //
|
|---|
| 157 | // b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
|
|---|
| 158 | //
|
|---|
| 159 |
|
|---|
| 160 | x1[index][particleTypeIndex]=x0[index][particleTypeIndex] + std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex])
|
|---|
| 161 | / (c0[index][particleTypeIndex] * d0[index][particleTypeIndex]), 1. / (d0[index][particleTypeIndex] - 1.));
|
|---|
| 162 | b1[index][particleTypeIndex]=(a0[index][particleTypeIndex] - a1[index][particleTypeIndex]) * x1[index][particleTypeIndex]
|
|---|
| 163 | + b0[index][particleTypeIndex] - c0[index][particleTypeIndex] * std::pow(x1[index][particleTypeIndex]
|
|---|
| 164 | - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
|
|---|
| 165 | }
|
|---|
| 166 |
|
|---|
| 167 | G4double x(std::log10(k/eV));
|
|---|
| 168 | G4double y;
|
|---|
| 169 |
|
|---|
| 170 | if (x<x0[index][particleTypeIndex])
|
|---|
| 171 | y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
|
|---|
| 172 | else if (x<x1[index][particleTypeIndex])
|
|---|
| 173 | y=a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex] - c0[index][particleTypeIndex]
|
|---|
| 174 | * std::pow(x - x0[index][particleTypeIndex], d0[index][particleTypeIndex]);
|
|---|
| 175 | else
|
|---|
| 176 | y=a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
|
|---|
| 177 |
|
|---|
| 178 | return f0[index][particleTypeIndex] * std::pow(10., y)*m*m;
|
|---|
| 179 |
|
|---|
| 180 | }
|
|---|
| 181 |
|
|---|
| 182 | G4int G4CrossSectionChargeDecreasePartial::RandomSelect(G4double k,
|
|---|
| 183 | const G4ParticleDefinition* particleDefinition)
|
|---|
| 184 | {
|
|---|
| 185 | G4int particleTypeIndex = 0;
|
|---|
| 186 | G4DNAGenericIonsManager *instance;
|
|---|
| 187 | instance = G4DNAGenericIonsManager::Instance();
|
|---|
| 188 |
|
|---|
| 189 | if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex = 0;
|
|---|
| 190 | if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex = 1;
|
|---|
| 191 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex = 2;
|
|---|
| 192 |
|
|---|
| 193 | const G4int n = numberOfPartialCrossSections[particleTypeIndex];
|
|---|
| 194 | G4double* values(new G4double[n]);
|
|---|
| 195 | G4double value(0);
|
|---|
| 196 | G4int i = n;
|
|---|
| 197 |
|
|---|
| 198 | while (i>0)
|
|---|
| 199 | {
|
|---|
| 200 | i--;
|
|---|
| 201 | values[i]=CrossSection(k, i, particleDefinition);
|
|---|
| 202 | value+=values[i];
|
|---|
| 203 | }
|
|---|
| 204 |
|
|---|
| 205 | value*=G4UniformRand();
|
|---|
| 206 |
|
|---|
| 207 | i=n;
|
|---|
| 208 | while (i>0)
|
|---|
| 209 | {
|
|---|
| 210 | i--;
|
|---|
| 211 |
|
|---|
| 212 | if (values[i]>value)
|
|---|
| 213 | break;
|
|---|
| 214 |
|
|---|
| 215 | value-=values[i];
|
|---|
| 216 | }
|
|---|
| 217 |
|
|---|
| 218 | delete[] values;
|
|---|
| 219 |
|
|---|
| 220 | return i;
|
|---|
| 221 | }
|
|---|
| 222 |
|
|---|
| 223 | G4double G4CrossSectionChargeDecreasePartial::Sum(G4double k, const G4ParticleDefinition* particleDefinition)
|
|---|
| 224 | {
|
|---|
| 225 | G4int particleTypeIndex = 0;
|
|---|
| 226 | G4DNAGenericIonsManager* instance;
|
|---|
| 227 | instance = G4DNAGenericIonsManager::Instance();
|
|---|
| 228 |
|
|---|
| 229 | if (particleDefinition == G4Proton::ProtonDefinition()) particleTypeIndex=0;
|
|---|
| 230 | if (particleDefinition == instance->GetIon("alpha++")) particleTypeIndex=1;
|
|---|
| 231 | if (particleDefinition == instance->GetIon("alpha+")) particleTypeIndex=2;
|
|---|
| 232 |
|
|---|
| 233 | G4double totalCrossSection = 0.;
|
|---|
| 234 |
|
|---|
| 235 | for (G4int i=0; i<numberOfPartialCrossSections[particleTypeIndex]; i++)
|
|---|
| 236 | {
|
|---|
| 237 | totalCrossSection += CrossSection(k,i,particleDefinition);
|
|---|
| 238 | }
|
|---|
| 239 | return totalCrossSection;
|
|---|
| 240 | }
|
|---|
| 241 |
|
|---|
| 242 |
|
|---|
